Datasheet

System Integration Module (SIM)
SIM Registers
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3 Technical Data
Freescale Semiconductor System Integration Module (SIM) 115
POR — Power-On Reset Bit
1 = A POR has occurred
0 = Read of RSR
PIN — External Reset Bit
1 = An external reset has occurred since the last read of the RSR
0 = Read of RSR
COP — Computer Operating Properly Reset Bit
1 = A COP reset has occurred since the last read of the RSR
0 = POR or read of RSR
ILOP — Illegal Opcode Reset Bit
An illegal opcode reset has occurred since the last read of the RSR
0 = POR or read of RSR
ILAD — Illegal Address Reset Bit (opcode fetches only)
1 = An illegal address reset has occurred since the last read of the
RSR
0 = POR or read of RSR
USB — Universal Serial Bus Reset Bit
1 = Last reset caused by the USB module
0 = POR or read of RSR
LVI — Low voltage inhibit Reset Bit
1 = A LVI reset has occurred since the last read of PSR
0 = POR or read of RSR
Address: $FE01
Bit 7654321Bit 0
Read: POR PIN COP ILOP ILAD USB LVI 0
Write:
POR:
10000000
= Unimplemented
Figure 8-19. Reset Status Register (RSR)